Reference signal resource sets for subband measurements

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for configuring and using reference signal resource sets for subband measurements.

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A UE may communicate with a BS via the downlink and uplink. “Downlink” (or forward link) refers to the communication link from the BS to the UE, and “uplink” (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. NR, which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

In some aspects, a user equipment (UE) for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to receive, from a base station, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station; receive, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and derive one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band.

In some aspects, a base station for wireless communication includes a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to transmit, to a UE, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE; and transmit, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

In some aspects, a method of wireless communication performed by a UE includes receiving, from a base station, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station; receiving, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and deriving one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band.

In some aspects, a method of wireless communication performed by a base station includes transmitting, to a UE, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE; and transmitting, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to receive, from a base station, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station; receive, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and derive one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to transmit, to a UE, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE; and transmit, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

In some aspects, an apparatus for wireless communication includes means for receiving, from a base station, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the apparatus and the base station; means for receiving, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and means for deriving one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band.

In some aspects, an apparatus for wireless communication includes means for transmitting, to a UE, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the apparatus and the UE; and means for transmitting, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and/or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, or artificial intelligence-enabled devices). Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals may include a number of components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers). It is intended that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, or end-user devices of varying size, shape, and constitution.

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements”). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

It should be noted that while aspects may be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

1 FIG. 100 100 100 110 110 110 110 110 a b c d is a diagram illustrating an example of a wireless network, in accordance with the present disclosure. The wireless networkmay be or may include elements of a 5G (NR) network and/or an LTE network, among other examples. The wireless networkmay include a number of base stations(shown as BS, BS, BS, and BS) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmit receive point (TRP), or the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.

1 FIG. 110 102 110 102 110 102 a a b b c c A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in, a BSmay be a macro BS for a macro cell, a BSmay be a pico BS for a pico cell, and a BSmay be a femto BS for a femto cell. A BS may support one or multiple (e.g., three) cells. The terms “eNB”, “base station”, “NR BS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” may be used interchangeably herein.

100 In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless networkthrough various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

100 110 110 120 110 120 1 FIG. d a d a d Wireless networkmay also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. In the example shown in, a relay BSmay communicate with macro BSand a UEin order to facilitate communication between BSand UE. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

100 100 Wireless networkmay be a heterogeneous network that includes BSs of different types, such as macro BSs, pico BSs, femto BSs, relay BSs, or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network. For example, macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

130 130 A network controllermay couple to a set of BSs and may provide coordination and control for these BSs. Network controllermay communicate with the BSs via a backhaul. The BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.

120 120 120 120 100 a b c UEs(e.g.,,,) may be dispersed throughout wireless network, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, or the like. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

120 120 Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and/or location tags, that may communicate with a base station, another device (e.g., remote device), or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE). UEmay be included inside a housing that houses components of UE, such as processor components and/or memory components. In some aspects, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, or the like. A frequency may also be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

120 120 120 110 120 120 110 a e In some aspects, two or more UEs(e.g., shown as UEand UE) may communicate directly using one or more sidelink channels (e.g., without using a base stationas an intermediary to communicate with one another). For example, the UEsmay communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol or a vehicle-to-infrastructure (V2I) protocol), and/or a mesh network. In this case, the UEmay perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station.

1 FIG. 5 6 FIGS.- 120 110 110 120 120 120 110 120 a a a a a As further shown in, the UEand the base stationmay exchange reference signals in order to perform beam refinement (e.g., as described below in connection with). For example, the base stationmay refine transmission beams based at least in part on measurements of reference signals (e.g., channel state information (CSI) reference signals (CSI-RSs) and/or other reference signals) performed by the UE. Similarly, the UEmay refine reception beams (also referred to as “reception filters”) based at least in part on measurements of the reference signals performed by the UE. Accordingly, the base stationand the UEmay improve communication quality and/or reliability using beam refinement.

100 100 Devices of wireless networkmay communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, channels, or the like. For example, devices of wireless networkmay communicate using an operating band having a first frequency range (FR1), which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2), which may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. Thus, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies less than 6 GHz, frequencies within FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.

1 FIG. 1 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with regard to.

2 FIG. 200 110 120 100 110 234 234 120 252 252 a t a r is a diagram illustrating an exampleof a base stationin communication with a UEin a wireless network, in accordance with the present disclosure. Base stationmay be equipped with T antennasthrough, and UEmay be equipped with R antennasthrough, where in general T≥1 and R≥1.

110 220 212 220 220 230 232 232 232 232 232 232 234 234 a t a t a t At base station, a transmit processormay receive data from a data sourcefor one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processormay also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols. Transmit processormay also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processormay perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs)through. Each modulatormay process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulatormay further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulatorsthroughmay be transmitted via T antennasthrough, respectively.

120 252 252 110 254 254 254 254 256 254 254 258 120 260 280 120 284 a r a r a r At UE, antennasthroughmay receive the downlink signals from base stationand/or other base stations and may provide received signals to demodulators (DEMODs)through, respectively. Each demodulatormay condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulatormay further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detectormay obtain received symbols from all R demodulatorsthrough, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processormay process (e.g., demodulate and decode) the detected symbols, provide decoded data for UEto a data sink, and provide decoded control information and system information to a controller/processor. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter, among other examples. In some aspects, one or more components of UEmay be included in a housing.

130 294 290 292 130 130 110 294 Network controllermay include communication unit, controller/processor, and memory. Network controllermay include, for example, one or more devices in a core network. Network controllermay communicate with base stationvia communication unit.

234 234 252 252 a t a r 2 FIG. Antennas (e.g., antennasthroughand/or antennasthrough) may include, or may be included within, one or more antenna panels, antenna groups, sets of antenna elements, and/or antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include a set of coplanar antenna elements and/or a set of non-coplanar antenna elements. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include antenna elements within a single housing and/or antenna elements within multiple housings. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of.

120 264 262 280 264 264 266 254 254 110 254 120 120 120 252 254 256 258 264 266 280 282 a r 6 8 FIGS.- On the uplink, at UE, a transmit processormay receive and process data from a data sourceand control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from controller/processor. Transmit processormay also generate reference symbols for one or more reference signals. The symbols from transmit processormay be precoded by a TX MIMO processorif applicable, further processed by modulatorsthrough(e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station. In some aspects, a modulator and a demodulator (e.g., MOD/DEMOD) of the UEmay be included in a modem of the UE. In some aspects, the UEincludes a transceiver. The transceiver may include any combination of antenna(s), modulators and/or demodulators, MIMO detector, receive processor, transmit processor, and/or TX MIMO processor. The transceiver may be used by a processor (e.g., controller/processor) and memoryto perform aspects of any of the methods described herein (for example, with reference to).

110 120 234 232 236 238 120 238 239 240 110 244 130 244 110 246 120 232 110 110 110 234 232 236 238 220 230 240 242 6 8 FIGS.- At base station, the uplink signals from UEand other UEs may be received by antennas, processed by demodulators, detected by a MIMO detectorif applicable, and further processed by a receive processorto obtain decoded data and control information sent by UE. Receive processormay provide the decoded data to a data sinkand the decoded control information to controller/processor. Base stationmay include communication unitand communicate to network controllervia communication unit. Base stationmay include a schedulerto schedule UEsfor downlink and/or uplink communications. In some aspects, a modulator and a demodulator (e.g., MOD/DEMOD) of the base stationmay be included in a modem of the base station. In some aspects, the base stationincludes a transceiver. The transceiver may include any combination of antenna(s), modulators and/or demodulators, MIMO detector, receive processor, transmit processor, and/or TX MIMO processor. The transceiver may be used by a processor (e.g., controller/processor) and memoryto perform aspects of any of the methods described herein (for example, with reference to).

240 110 280 120 240 110 280 120 700 800 242 282 110 120 242 282 110 120 120 110 700 800 2 FIG. 2 FIG. 7 FIG. 8 FIG. 7 FIG. 8 FIG. Controller/processorof base station, controller/processorof UE, and/or any other component(s) ofmay perform one or more techniques associated with configuring and using reference signal resource sets for subband measurements, as described in more detail elsewhere herein. For example, controller/processorof base station, controller/processorof UE, and/or any other component(s) ofmay perform or direct operations of, for example, processof, processof, and/or other processes as described herein. Memoriesandmay store data and program codes for base stationand UE, respectively. In some aspects, memoryand/or memorymay include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base stationand/or the UE, may cause the one or more processors, the UE, and/or the base stationto perform or direct operations of, for example, processof, processof, and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

120 900 110 1000 252 254 256 258 264 266 254 280 282 9 FIG. 10 FIG. In some aspects, a UE (e.g., the UEand/or apparatusof) may include means for receiving, from a base station (e.g., the base stationand/or apparatusof), an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station; means for receiving, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and/or means for deriving one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band. The means for the UE to perform operations described herein may include, for example, one or more of antenna, demodulator, MIMO detector, receive processor, transmit processor, TX MIMO processor, modulator, controller/processor, or memory.

110 1000 120 900 220 230 232 234 232 236 238 240 242 246 10 FIG. 9 FIG. In some aspects, a base station (e.g., the base stationand/or apparatusof) may include means for transmitting, to a UE (e.g., the UEand/or apparatusof), an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE; and/or means for transmitting, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band. The means for the base station to perform operations described herein may include, for example, one or more of transmit processor, TX MIMO processor, modulator, antenna, demodulator, MIMO detector, receive processor, controller/processor, memory, or scheduler.

2 FIG. 264 258 266 280 While blocks inare illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor, the receive processor, and/or the TX MIMO processormay be performed by or under the control of controller/processor.

2 FIG. 2 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with regard to.

3 FIG. 300 300 100 300 is a diagram illustrating an example beamforming architecturethat supports beamforming for mmW communications, in accordance with the present disclosure. In some aspects, architecturemay implement aspects of wireless network. In some aspects, architecturemay be implemented in a transmitting device (e.g., a first wireless communication device, UE, or base station) and/or a receiving device (e.g., a second wireless communication device, UE, or base station), as described herein.

3 FIG. 300 302 304 306 308 310 300 312 314 316 318 320 Broadly,is a diagram illustrating example hardware components of a wireless communication device in accordance with certain aspects of the disclosure. The illustrated components may include those that may be used for antenna element selection and/or for beamforming for transmission of wireless signals. There are numerous architectures for antenna element selection and implementing phase shifting, only one example of which is illustrated here. The architectureincludes a modem (modulator/demodulator), a digital to analog converter (DAC), a first mixer, a second mixer, and a splitter. The architecturealso includes multiple first amplifiers, multiple phase shifters, multiple second amplifiers, and an antenna arraythat includes multiple antenna elements.

322 324 326 328 300 322 324 326 328 330 332 334 334 240 280 2 FIG. 2 FIG. Transmission lines or other waveguides, wires, and/or traces are shown connecting the various components to illustrate how signals to be transmitted may travel between components. Reference numbers,,, andindicate regions in the architecturein which different types of signals travel or are processed. Specifically, reference numberindicates a region in which digital baseband signals travel or are processed, reference numberindicates a region in which analog baseband signals travel or are processed, reference numberindicates a region in which analog intermediate frequency (IF) signals travel or are processed, and reference numberindicates a region in which analog radio frequency (RF) signals travel or are processed. The architecture also includes a local oscillator A, a local oscillator B, and a controller/processor. In some aspects, controller/processorcorresponds to controller/processorof the base station described above in connection withand/or controller/processorof the UE described above in connection with.

320 320 320 320 320 320 320 Each of the antenna elementsmay include one or more sub-elements for radiating or receiving RF signals. For example, a single antenna elementmay include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals. The antenna elementsmay include patch antennas, dipole antennas, or other types of antennas arranged in a linear pattern, a two dimensional pattern, or another pattern. A spacing between antenna elementsmay be such that signals with a desired wavelength transmitted separately by the antenna elementsmay interact or interfere (e.g., to form a desired beam). For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, half wavelength, or other fraction of a wavelength of spacing between neighboring antenna elementsto allow for interaction or interference of signals transmitted by the separate antenna elementswithin that expected range.

302 304 306 308 310 312 314 316 320 302 304 302 306 330 306 330 308 332 308 332 302 334 330 332 The modemprocesses and generates digital baseband signals and may also control operation of the DAC, first and second mixersand, respectively, splitter, first amplifiers, phase shifters, and/or the second amplifiersto transmit signals via one or more or all of the antenna elements. The modemmay process signals and control operation in accordance with a communication standard such as a wireless standard discussed herein. The DACmay convert digital baseband signals received from the modem(and that are to be transmitted) into analog baseband signals. The first mixerupconverts analog baseband signals to analog IF signals within an IF using a local oscillator A. For example, the first mixermay mix the signals with an oscillating signal generated by the local oscillator Ato “move” the baseband analog signals to the IF. In some cases, some processing or filtering (not shown) may take place at the IF. The second mixerupconverts the analog IF signals to analog RF signals using the local oscillator B. Similar to the first mixer, the second mixermay mix the signals with an oscillating signal generated by the local oscillator Bto “move” the IF analog signals to the RF or the frequency at which signals will be transmitted or received. The modemand/or the controller/processormay adjust the frequency of local oscillator Aand/or the local oscillator Bso that a desired IF and/or RF frequency is produced and used to facilitate processing and transmission of a signal within a desired bandwidth.

300 308 310 310 300 320 312 316 314 320 320 318 310 310 310 310 310 310 In the illustrated architecture, signals upconverted by the second mixerare split or duplicated into multiple signals by the splitter. The splitterin architecturesplits the RF signal into multiple identical or nearly identical RF signals. In other examples, the split may take place with any type of signal, including with baseband digital, baseband analog, or IF analog signals. Each of these signals may correspond to an antenna element, and the signal travels through and is processed by amplifiersand, phase shifters, and/or other elements corresponding to the respective antenna elementto be provided to and transmitted by the corresponding antenna elementof the antenna array. In one example, the splittermay be an active splitter that is connected to a power supply and provides some gain so that RF signals exiting the splitterare at a power level equal to or greater than the signal entering the splitter. In another example, the splitteris a passive splitter that is not connected to power supply and the RF signals exiting the splittermay be at a power level lower than the RF signal entering the splitter.

310 312 314 320 312 316 312 316 312 316 312 316 310 312 314 316 After being split by the splitter, the resulting RF signals may enter an amplifier, such as a first amplifier, or a phase shiftercorresponding to an antenna element. The first and second amplifiersand, respectively, are illustrated with dashed lines because one or both of them might not be necessary in some aspects. In some aspects, both the first amplifierand second amplifierare present. In some aspects, neither the first amplifiernor the second amplifieris present. In some aspects, one of the two amplifiersandis present but not the other. By way of example, if the splitteris an active splitter, the first amplifiermay not be used. By way of further example, if the phase shifteris an active phase shifter that can provide a gain, the second amplifiermight not be used.

312 316 320 312 316 302 334 320 302 334 310 312 314 316 320 The amplifiersandmay provide a desired level of positive or negative gain. A positive gain (positive dB) may be used to increase an amplitude of a signal for radiation by a specific antenna element. A negative gain (negative dB) may be used to decrease an amplitude and/or suppress radiation of the signal by a specific antenna element. Each of the amplifiersandmay be controlled independently (e.g., by the modemor the controller/processor) to provide independent control of the gain for each antenna element. For example, the modemand/or the controller/processormay have at least one control line connected to each of the splitter, first amplifiers, phase shifters, and/or second amplifiersthat may be used to configure a gain to provide a desired amount of gain for each component and thus each antenna element.

314 314 316 314 314 302 334 314 314 320 The phase shiftermay provide a configurable phase shift or phase offset to a corresponding RF signal to be transmitted. The phase shiftermay be a passive phase shifter not directly connected to a power supply. Passive phase shifters might introduce some insertion loss. The second amplifiermay boost the signal to compensate for the insertion loss. The phase shiftermay be an active phase shifter connected to a power supply such that the active phase shifter provides some amount of gain or prevents insertion loss. The settings of each of the phase shiftersare independent, meaning that each can be independently set to provide a desired amount of phase shift or the same amount of phase shift or some other configuration. The modemand/or the controller/processormay have at least one control line connected to each of the phase shiftersand which may be used to configure the phase shiftersto provide a desired amount of phase shift or phase offset between antenna elements.

300 320 356 356 318 356 318 354 354 354 302 334 354 354 320 In the illustrated architecture, RF signals received by the antenna elementsare provided to one or more first amplifiersto boost the signal strength. The first amplifiersmay be connected to the same antenna arrays(e.g., for time division duplex (TDD) operations). The first amplifiersmay be connected to different antenna arrays. The boosted RF signal is input into one or more phase shiftersto provide a configurable phase shift or phase offset for the corresponding received RF signal to enable reception via one or more Rx beams. The phase shiftermay be an active phase shifter or a passive phase shifter. The settings of the phase shiftersare independent, meaning that each can be independently set to provide a desired amount of phase shift or the same amount of phase shift or some other configuration. The modemand/or the controller/processormay have at least one control line connected to each of the phase shiftersand which may be used to configure the phase shiftersto provide a desired amount of phase shift or phase offset between antenna elementsto enable reception via one or more Rx beams.

354 352 352 352 350 352 356 352 356 352 356 352 356 The outputs of the phase shiftersmay be input to one or more second amplifiersfor signal amplification of the phase shifted received RF signals. The second amplifiersmay be individually configured to provide a configured amount of gain. The second amplifiersmay be individually configured to provide an amount of gain to ensure that the signals input to combinerhave the same magnitude. The amplifiersandare illustrated in dashed lines because they might not be necessary in some aspects. In some aspects, both the amplifierand the amplifierare present. In another aspect, neither the amplifiernor the amplifierare present. In other aspects, one of the amplifiersandis present but not the other.

300 354 352 350 350 300 350 350 350 350 350 352 In the illustrated architecture, signals output by the phase shifters(via the amplifierswhen present) are combined in combiner. The combinerin architecturecombines the RF signal into a signal. The combinermay be a passive combiner (e.g., not connected to a power source), which may result in some insertion loss. The combinermay be an active combiner (e.g., connected to a power source), which may result in some signal gain. When combineris an active combiner, it may provide a different (e.g., configurable) amount of gain for each input signal so that the input signals have the same magnitude when they are combined. When combineris an active combiner, the combinermay not need the second amplifierbecause the active combiner may provide the signal amplification.

350 348 346 348 346 372 370 348 346 344 344 302 The output of the combineris input into mixersand. Mixersandgenerally down convert the received RF signal using inputs from local oscillatorsand, respectively, to create intermediate or baseband signals that carry the encoded and modulated information. The output of the mixersandare input into an analog-to-digital converter (ADC)for conversion to analog signals. The analog signals output from ADCis input to modemfor baseband processing, such as decoding, de-interleaving, or similar operations.

300 300 300 318 The architectureis given by way of example only to illustrate an architecture for transmitting and/or receiving signals. In some cases, the architectureand/or each portion of the architecturemay be repeated multiple times within an architecture to accommodate or provide an arbitrary number of RF chains, antenna elements, and/or antenna panels. Furthermore, numerous alternate architectures are possible and contemplated. For example, although only a single antenna arrayis shown, two, three, or more antenna arrays may be included, each with one or more of their own corresponding amplifiers, phase shifters, splitters, mixers, DACs, ADCs, and/or modems. For example, a single UE may include two, four, or more antenna arrays for transmitting or receiving signals at different physical locations on the UE or in different directions.

322 324 326 328 310 312 316 314 304 306 306 308 314 312 316 308 314 308 332 Furthermore, mixers, splitters, amplifiers, phase shifters and other components may be located in different signal type areas (e.g., represented by different ones of the reference numbers,,, and) in different implemented architectures. For example, a split of the signal to be transmitted into multiple signals may take place at the analog RF, analog IF, analog baseband, or digital baseband frequencies in different examples. Similarly, amplification and/or phase shifts may also take place at different frequencies. For example, in some aspects, one or more of the splitter, amplifiersand, or phase shiftersmay be located between the DACand the first mixeror between the first mixerand the second mixer. In one example, the functions of one or more of the components may be combined into one component. For example, the phase shiftersmay perform amplification to include or replace the first amplifierand/or the second amplifier. By way of another example, a phase shift may be implemented by the second mixerto obviate the need for a separate phase shifter. This technique is sometimes called local oscillator (LO) phase shifting. In some aspects of this configuration, there may be multiple IF to RF mixers (e.g., for each antenna element chain) within the second mixer, and the local oscillator Bmay supply different local oscillator signals (with different phase offsets) to each IF to RF mixer.

302 334 304 372 320 320 312 316 320 318 314 312 316 334 300 334 302 The modemand/or the controller/processormay control one or more of the other componentsthroughto select one or more antenna elementsand/or to form beams for transmission of one or more signals. For example, the antenna elementsmay be individually selected or deselected for transmission of a signal (or signals) by controlling an amplitude of one or more corresponding amplifiers, such as the first amplifiersand/or the second amplifiers. Beamforming includes generation of a beam using multiple signals on different antenna elements, where one or more or all of the multiple signals are shifted in phase relative to each other. The formed beam may carry physical or higher layer reference signals or information. As each signal of the multiple signals is radiated from a respective antenna element, the radiated signals interact, interfere (constructive and destructive interference), and amplify each other to form a resulting beam. The shape (such as the amplitude, width, and/or presence of side lobes) and the direction (such as an angle of the beam relative to a surface of the antenna array) can be dynamically controlled by modifying the phase shifts or phase offsets imparted by the phase shiftersand amplitudes imparted by the amplifiersandof the multiple signals relative to each other. The controller/processormay be located partially or fully within one or more other components of the architecture. For example, the controller/processormay be located within the modemin some aspects.

3 FIG. 1 2 FIGS.- 5 FIG. 1 2 FIGS.- 5 FIG. 380 334 300 110 380 300 120 380 As further shown in, a higher layer, such as medium access control (MAC) layer, may perform beam refinement (e.g., based at least in part on measurements of one or more reference signals, such as one or more CSI-RSs) and instruct the controller/processorto generate narrower beams in accordance with the refinement. For example, the architecturemay be included in a base station (e.g., base stationof) such that the MAC layermay perform beam refinement according to a P2 procedure, as described below in connection with. Similarly, the architecturemay be included in a UE (e.g., UEof) such that the MAC layermay perform beam refinement according to a P3 procedure, as described below in connection with.

3 FIG. 3 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with regard to.

4 FIG. 4 FIG. 400 110 120 is a diagram illustrating an exampleof using beams for communications between a base station and a UE, in accordance with the present disclosure. As shown in, a base stationand a UEmay communicate with one another.

110 110 110 120 110 120 120 110 405 The base stationmay transmit to UEs located within a coverage area of the base station. The base stationand the UEmay be configured for beamformed communications, where the base stationmay transmit in the direction of the UEusing a directional BS transmit beam, and the UEmay receive the transmission using a directional UE receive beam. Each BS transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples. The base stationmay transmit downlink communications via one or more BS transmit beams.

120 410 120 120 405 405 410 410 405 410 120 405 120 110 120 120 110 405 410 5 FIG. The UEmay attempt to receive downlink transmissions via one or more UE receive beams, which may be configured using different beamforming parameters at receive circuitry of the UE. The UEmay identify a particular BS transmit beam, shown as BS transmit beam-A, and a particular UE receive beam, shown as UE receive beam-A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of BS transmit beamsand UE receive beams). In some examples, the UEmay transmit an indication of which BS transmit beamis identified by the UEas a preferred BS transmit beam, which the base stationmay select for transmissions to the UE. The UEmay thus attain and maintain a beam pair link (BPL) with the base stationfor downlink communications (for example, a combination of the BS transmit beam-A and the UE receive beam-A), which may be further refined and maintained in accordance with one or more established beam refinement procedures (e.g., as described below in connection with).

405 410 405 120 405 405 110 405 410 120 120 410 110 405 A downlink beam, such as a BS transmit beamor a UE receive beam, may be associated with a transmission configuration indication (TCI) state. A TCI state may indicate a directionality or a characteristic of the downlink beam, such as one or more quasi-co-location (QCL) properties of the downlink beam. A QCL property may include, for example, a Doppler shift, a Doppler spread, an average delay, a delay spread, or spatial receive parameters, among other examples. In some examples, each BS transmit beammay be associated with a synchronization signal block (SSB), and the UEmay indicate a preferred BS transmit beamby transmitting uplink transmissions in resources of the SSB that are associated with the preferred BS transmit beam. A particular SSB may have an associated TCI state (for example, for an antenna port or for beamforming). The base stationmay, in some examples, indicate a downlink BS transmit beambased at least in part on antenna port QCL properties that may be indicated by the TCI state. A TCI state may be associated with one downlink reference signal set (for example, an SSB and an aperiodic, periodic, or semi-persistent CSI-RS) for different QCL types (for example, QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial receive parameters, among other examples). In cases where the QCL type indicates spatial receive parameters, the QCL type may correspond to analog receive beamforming parameters of a UE receive beamat the UE. Thus, the UEmay select a corresponding UE receive beamfrom a set of BPLs based at least in part on the base stationindicating a BS transmit beamvia a TCI indication.

110 110 110 120 120 120 120 120 The base stationmay maintain a set of activated TCI states for downlink shared channel transmissions and a set of activated TCI states for downlink control channel transmissions. The set of activated TCI states for downlink shared channel transmissions may correspond to beams that the base stationuses for downlink transmission on a physical downlink shared channel (PDSCH). The set of activated TCI states for downlink control channel communications may correspond to beams that the base stationmay use for downlink transmission on a physical downlink control channel (PDCCH) or in a control resource set (CORESET). The UEmay also maintain a set of activated TCI states for receiving the downlink shared channel transmissions and the CORESET transmissions. If a TCI state is activated for the UE, then the UEmay have one or more antenna configurations based at least in part on the TCI state, and the UEmay not need to reconfigure antennas or antenna weighting configurations. In some examples, the set of activated TCI states (for example, activated PDSCH TCI states and activated CORESET TCI states) for the UEmay be configured by a configuration message, such as a radio resource control (RRC) message.

120 110 110 120 415 Similarly, for uplink communications, the UEmay transmit in the direction of the base stationusing a directional UE transmit beam, and the base stationmay receive the transmission using a directional BS receive beam. Each UE transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples. The UEmay transmit uplink communications via one or more UE transmit beams.

110 420 110 415 415 420 420 415 420 110 415 110 110 120 120 110 415 420 415 420 The base stationmay receive uplink transmissions via one or more BS receive beams. The base stationmay identify a particular UE transmit beam, shown as UE transmit beam-A, and a particular BS receive beam, shown as BS receive beam-A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of UE transmit beamsand BS receive beams). In some examples, the base stationmay transmit an indication of which UE transmit beamis identified by the base stationas a preferred UE transmit beam, which the base stationmay select for transmissions from the UE. The UEand the base stationmay thus attain and maintain a BPL for uplink communications (for example, a combination of the UE transmit beam-A and the BS receive beam-A), which may be further refined and maintained in accordance with one or more established beam refinement procedures. An uplink beam, such as a UE transmit beamor a BS receive beam, may be associated with a spatial relation. A spatial relation may indicate a directionality or a characteristic of the uplink beam, similar to one or more QCL properties, as described above.

4 FIG. 4 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with respect to.

5 FIG. 5 FIG. 500 110 120 is a diagram illustrating an exampleof beam refinement procedures, in accordance with the present disclosure. As shown in, a base stationand a UEmay communicate with one another.

5 FIG. 3 FIG. 3 FIG. 110 505 510 500 110 110 120 515 120 120 110 120 505 510 110 110 505 500 120 During an initial P1 procedure as shown in, the base stationmay sweep through a plurality of beams (e.g., beamand beamin example), which may be configured using different beamforming parameters at transmit circuitry of the base station(e.g., as described above in connection with). The base stationmay transmit reference signals, such as SSBs, using the plurality of beams during the P1 procedure. Accordingly, the UEmay measure the reference signals via a receive beam(also referred to as a “reception filter”), which may be configured using different beamforming parameters at receive circuitry of the UE(e.g., as described above in connection with). For example, the UEmay perform one or more L1 measurements (including, for example, an RSRP, a signal-to-interference-and-noise ratio (SINR), and/or another L1 measurement) and transmit a report including the one or more measurements to the base station. Additionally, or alternatively, the UEmay determine a preferred beam of beamand beambased at least in part on the measuring and transmit a report indicating the preferred beam to the base station. Accordingly, the base stationmay select a beam (e.g., beamin example), to use when communicating with the UE, based at least in part on the P1 procedure.

5 FIG. 3 FIG. 110 505 110 505 505 500 110 110 120 515 120 110 120 505 505 110 110 505 500 120 a b a b b As further shown in, the base stationmay refine the selected beamduring a P2 procedure. For example, the base stationmay sweep through a plurality of subbeams (e.g., subbeamand subbeamin example), which may be configured using different beamforming parameters at transmit circuitry of the base station(e.g., as described above in connection with). As used herein, a “subbeam” may refer to a narrowed beam selected from a wider beam; in some cases, the broad term “beam” may refer to a wider beam or may refer to a narrower subbeam. The base stationmay transmit reference signals, such as CSI-RSs, using the plurality of subbeams during the P2 procedure. Accordingly, the UEmay measure the reference signals via the receive beam. For example, the UEmay perform one or more L1 measurements (including, for example, an RSRP, an SINR, and/or another L1 measurement) and transmit a report including the one or more measurements to the base station. Additionally, or alternatively, the UEmay determine a preferred subbeam of subbeamand subbeambased at least in part on the measuring and transmit a report indicating the preferred subbeam to the base station. Accordingly, the base stationmay select a subbeam (e.g., subbeamin example) to use when communicating with the UE, based at least in part on the P2 procedure.

120 515 110 505 505 120 515 515 500 120 120 515 515 120 515 515 120 110 b a b a b a b 3 FIG. Additionally, or alternatively, the UEmay refine the receive beamduring a P3 procedure. For example, the base stationmay repeat transmission of a reference signal, such as a CSI-RS, over time using a same beam (e.g., selected beamor selected subbeam) during the P3 procedure. Accordingly, the UEmay sweep through a plurality of refined reception filters (e.g., filterand filterin example), which may be configured using different beamforming parameters at receive circuitry of the UE(e.g., as described above in connection with). As used herein, a “refined reception filter” may refer to a narrowed filter selected from a wider filter; in some cases, the broad term “reception filter” may refer to a wider filter or may refer to a narrower filter. The UEmay measure repetitions of the reference signal via different reception filtersand. For example, the UEmay perform L1 measurements (including, for example, RSRPs, SINRs, and/or other L1 measurements) and determine a preferred refined reception filter of filterand filterbased at least in part on the measuring. Accordingly, the UEmay select a refined reception filter, to use when communicating with the base station, based at least in part on the P3 procedure.

110 In some situations, a base station and a UE may be configured to use a portion of a band for communication. For example, in mmW communications and/or other higher-frequency communications, a component carrier may be associated with a large bandwidth (e.g., 2 GHz or higher) within the band, such that the base station and the UE use a subband (e.g., 100 MHz, 200 MHz, and so on) within the large bandwidth. For example, the base stationmay schedule a transmission to the UE (e.g., on a PDSCH) that uses the subband rather than the large bandwidth.

3 FIG. Generally, the base station refines transmission beams (e.g., according to a P2 procedure) and/or the UE refines reception filters (e.g., according to a P3 procedure) using a full bandwidth. However, interference and noise on some subbands of the large bandwidth may be different than on other subbands of the large bandwidth. Additionally, some circuitry components (e.g., phase shifters as described above in connection with) are frequency dependent such that a transmit power of a selected subbeam varies across different subbands and/or a receive power of a selected refined reception filter varies across different subbands. Accordingly, the base station may select a suboptimal subbeam and/or the UE may select a suboptimal refined reception filter for use on a particular subband. This reduces quality and/or reliability of communications and also wastes network overhead, processing resources, and power because more retransmissions are likely to be used to compensate for transmissions lost due to low quality and/or reliability.

The base station may configure (e.g., via a CSI-ReportConfig data structure as defined in 3GPP specifications and/or another standard) different reference signal resources (e.g., frequency allocations, time allocations, time periodicities, associated TCI states, and/or other physical and/or logical properties associated with a reference signal) for different subbands. Accordingly, the base station and the UE may select a more optimal subbeam and/or the UE may select a suboptimal refined reception filter for use on a particular subband. However, the base station consumes network overhead, processing resources, and power in configuring multiple sets of reference signal resources corresponding to multiple subbands, and the UE consumes processing resources and power in receiving and storing information associated with the multiple sets of reference signal resources.

110 120 110 120 Some techniques and apparatuses described herein enable a base station (e.g., base station) to configure a set of reference signal resources that is shared across two or more subbands within a band. Accordingly, a UE (e.g., UE) may measure reference signals using that set of resources and use post-processing to derive measurements associated with one subband of the two or more subbands. As a result, the base stationconserves network overhead, processing resources, and power by reducing a quantity of transmissions to configure reference signal resources for use in beam refinement (e.g., a P2 procedure and/or a P3 procedure, as described above). Additionally, the UEperforms more processing on measurements of the reference signals but conserves processing resources and power up-front during configuration of the reference signal resources.

5 FIG. 5 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with respect to.

6 FIG. 6 FIG. 1 FIG. 600 110 120 110 120 100 is a diagram illustrating an exampleassociated with configuring and using reference signal resource sets for subband measurements, in accordance with the present disclosure. As shown in, a base stationand a UEmay communicate with one another. In some aspects, the base stationand the UEmay be included in a wireless network, such as wireless networkof.

605 110 120 110 120 120 110 As shown in connection with reference number, the base stationmay transmit, and the UEmay receive, an indication of a set of reference signal resources. For example, the base stationmay transmit, and the UEmay receive, a CSI-ReportConfig data structure as defined in 3GPP specifications and/or another standard. The set of reference signal resources may include a frequency allocation, a time allocation, MCS schemes, and/or other physical and/or logical properties associated with one or more reference signals that will be transmitted over the set of resources. In some aspects, the set of reference signal resources may be associated with two or more subbands included in a band used for communication between the UEand the base station. For example, the band may be a mmW band and/or other higher-frequency band including at least one component carrier with a large bandwidth (e.g., 2 GHz or higher), and each subband may include a portion (e.g., 100 MHz, 200 MHz, and so on) of the large bandwidth.

In some aspects, the set of reference signal resources may include a set of CSI-RS resources. Additionally, or alternatively, the set of reference signal resources may include a set of SSB resources and/or a set of resources associated with another type of reference signal.

110 110 120 110 120 120 The base stationmay include the indication of the set of reference signal resources in an RRC message, a MAC control element (MAC-CE), downlink control information (DCI), or a combination thereof. In some aspects, the base stationmay transmit, and the UEmay receive, the indication of the set of reference signal resources via RRC signaling, and the base stationmay further transmit, and the UEmay further receive, an activation of the set of reference signal resources via MAC-CE and/or DCI. As an alternative, the UEmay consider the set of reference signal resources as activated upon receiving the indication of the set of reference signal resources.

110 120 110 110 120 110 120 120 In some aspects, the base stationmay transmit, and the UEmay receive, an indication of the two or more subbands. The base stationmay include the indication of the two or more subbands in an RRC message, a MAC-CE, DCI, or a combination thereof. In some aspects, the base stationmay transmit, and the UEmay receive, the indication of the two or more subbands via RRC signaling, and the base stationmay further transmit, and the UEmay further receive, an activation of the two or more subbands via MAC-CE and/or DCI. As an alternative, the UEmay consider the two or more subbands as activated upon receiving the indication of the two or more subbands. The indication of the set of reference signal resources may be included in a same message as the indication of the two or more subbands (e.g., an RRC message including both a CSI-ReportConfig data structure and a CSI-ReportingBand data structure as defined in 3GPP specifications and/or another standard) or a different message. Additionally, or alternatively, in some aspects, the activation of the set of reference signal resources may be included in a same message as the activation of the two or more subbands (e.g., a MAC-CE and/or DCI that activations both the set of reference signal resources and the activation) or a different message.

120 110 110 Additionally, or alternatively, the two or more subbands may be based at least in part on one or more rules. For example, a memory of the UE(and/or a memory of the base station) may store the rule(s) according to 3GPP specifications and/or another standard that indicates how to divide the large bandwidth into the two or more subbands. In some aspects, the rule(s) may be used to determine a grid (or other set) of subbands within the large frequency, and the base stationmay transmit an indication of two or more of the subbands within that grid (or other set).

610 110 120 110 As shown in connection with reference number, the base stationmay transmit, and the UEmay receive, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band. For example, the base stationmay transmit the at least one reference signal modulated using the large bandwidth. In some aspects, the at least one reference signal may include a CSI-RS, an SSB, and/or another reference signal.

120 120 Accordingly, the UEmay measure the at least one reference signal. For example, the UEmay perform one or more L1 measurements (including, for example, an RSRP, an SINR, and/or another L1 measurement) and generate a CSI report based at least in part on the L1 measurement(s).

615 120 120 120 Additionally, as shown in connection with reference number, the UEmay derive one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band. For example, the UEmay perform filtering and/or other post-processing on the L1 measurement(s) in order to isolate L1 measurements associated with portions of the at least one reference signal received within that subband from other portions of the at least one reference signal received outside of that subband. Additionally, or alternatively, the UEmay generate a CSI report based at least in part on the filtering.

120 110 120 120 5 FIG. 5 FIG. The UEmay measure the at least one reference signal as part of a P2 procedure (e.g., as described above in connection with). Accordingly, the one or more measurements may be associated with a first beam (e.g., transmitted by the base stationusing the first beam). As an alternative, the UEmay measure the at least one reference signal as part of a P3 procedure (e.g., as described above in connection with). Accordingly, the one or more measurements may be associated with a first reception filter (e.g., used by the UEto receive the at least one reference signal).

620 110 120 110 120 120 As shown in connection with reference number, the base stationmay transmit, and the UEmay receive, based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band. Accordingly, the base stationmay sweep the first beam and the second beam using the at least one reference signal (e.g., as part of a P2 procedure). Although described in connection with two beams, the description similarly applies to additional beams (e.g., three beams, four beams, and so on). The UEmay measure the at least one reference signal again. For example, the UEmay perform one or more L1 measurements (including, for example, an RSRP, an SINR, and/or another L1 measurement) and generate a CSI report based at least in part on the L1 measurement(s).

110 120 110 120 120 120 As an alternative, the base stationmay transmit, and the UEmay receive, based at least in part on the one or more resources of the set of reference signal resources and using a second reception filter, a repetition of the at least one reference signal over the band. Accordingly, the base stationmay transmit two or more repetitions of the at least one reference signal over the band using a same beam. Thus, the UEmay use the repetitions to select between the first reception filter and the second reception filter (e.g., as part of a P3 procedure). Although described in connection with two reception filters, the description similarly applies to additional reception filters (e.g., three reception filters, four reception filters, and so on). The UEmay measure the at least one reference signal again. For example, the UEmay perform one or more L1 measurements (including, for example, an RSRP, an SINR, and/or another L1 measurement) and generate a CSI report based at least in part on the L1 measurement(s).

625 120 120 120 As shown in connection with reference number, the UEmay derive one or more additional measurements, associated with the second beam and the one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band using the second beam. For example, the UEmay perform filtering and/or other post-processing on the L1 measurement(s) in order to isolate L1 measurements associated with portions of the at least one reference signal received within that subband from other portions of the at least one reference signal received outside of that subband. Additionally, or alternatively, the UEmay generate a CSI report based at least in part on the filtering. In some aspects, the CSI report may be based at least in part on the derived measurement(s) associated with the first beam and the additional derived measurement(s) associated with the second beam.

120 120 120 As an alternative, the UEmay derive one or more additional measurements, associated with the second reception filter and the one subband of the two or more subbands, based at least in part on the repetition of the at least one reference signal received over the band using the second reception filter. For example, the UEmay perform filtering and/or other post-processing on the L1 measurement(s) in order to isolate L1 measurements associated with portions of the at least one reference signal received within that subband from other portions of the at least one reference signal received outside of that subband. Additionally, or alternatively, the UEmay generate a CSI report based at least in part on the filtering. In some aspects, the CSI report may be based at least in part on the derived measurement(s) associated with the first reception filter and the additional derived measurement(s) associated with the second reception filter.

630 120 110 600 120 110 110 4 FIG. As shown in connection with reference number, the UEmay transmit, and the base stationmay receive, an indication of a preferred beam on the one subband of the two or more subbands, based at least in part on the one or more measurements. In example, the preferred beam may be selected from at least the first beam and the second beam based at least in part on the one or more measurements and the one or more additional measurements. For example, the UEmay transmit a CSI report to the base stationthat indicates the preferred beam. Accordingly, the base stationmay apply a TCI state (e.g., as described above in connection with) to use on the one subband of the two or more subbands, based at least in part on the preferred beam.

120 600 As an alternative, the UEmay apply a preferred reception filter to use on the one subband of the two or more subbands, based at least in part on the one or more measurements. In example, the preferred reception filter may be selected from at least the first reception filter and the second reception filter based at least in part on the one or more measurements and the one or more additional measurements.

6 FIG. 5 FIG. 110 120 110 120 By using techniques as described in connection with, the base stationmay configure a set of reference signal resources that is shared across the two or more subbands. Accordingly, the UEmay measure reference signals using that set of resources and use filtering and/or other post-processing to derive the one or more measurements (and the one or more additional measurements) associated with the one subband of the two or more subbands. As a result, the base stationconserves network overhead, processing resources, and power by reducing a quantity of transmissions to configure the set of reference signal resources for use in beam refinement (e.g., a P2 procedure and/or a P3 procedure, as described above in connection with). Additionally, the UEconserves processing resources and power that would have been consumed up-front during configuration of the set of reference signal resources.

6 FIG. 6 FIG. As indicated above,is provided as an example. Other examples may differ from what is described with respect to.

7 FIG. 9 FIG. 700 700 120 900 is a diagram illustrating an example processperformed, for example, by a UE, in accordance with the present disclosure. Example processis an example where the UE (e.g., UEand/or apparatusof) performs operations associated with using reference signal resource sets for subband measurements.

7 FIG. 10 FIG. 9 FIG. 6 FIG. 700 110 1000 710 902 As shown in, in some aspects, processmay include receiving, from a base station (e.g., base stationand/or apparatusof), an indication of a set of reference signal resources (block). For example, the UE (e.g., using reception component, depicted in) may receive an indication of a set of reference signal resources, as described above in connection with. In some aspects, the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station.

7 FIG. 6 FIG. 6 FIG. 700 720 902 700 902 As further shown in, in some aspects, processmay include receiving, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band (block). For example, the UE (e.g., using reception component) may receive, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band, as described above in connection with. Additionally, in some aspects, processmay further include receiving, from the base station, an indication of the two or more subbands. For example, the UE (e.g., using reception component) may receive, from the base station, an indication of the two or more subbands, as described above in connection with.

7 FIG. 9 FIG. 6 FIG. 9 FIG. 6 FIG. 6 FIG. 700 730 908 700 904 700 902 As further shown in, in some aspects, processmay include deriving one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band (block). For example, the UE (e.g., using derivation component, depicted in) may derive one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band, as described above in connection with. In some aspects, processmay further include transmitting, to the base station, an indication of a preferred beam on the one subband of the two or more subbands, based at least in part on the one or more measurements. For example, the UE (e.g., using transmission component, depicted in) may transmit, to the base station, an indication of a preferred beam on the one subband of the two or more subbands, based at least in part on the one or more measurements, as described above in connection with. As an alternative, processmay further include applying a preferred reception filter to use on the one subband of the two or more subbands, based at least in part on the one or more measurements. For example, the UE (e.g., using reception component) may apply a preferred reception filter to use on the one subband of the two or more subbands, based at least in part on the one or more measurements, as described above in connection with.

700 Processmay include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the set of reference signal resources includes a set of CSI-RS resources.

In a second aspect, alone or in combination with the first aspect, the two or more subbands are based at least in part on one or more rules stored in a memory of the UE.

700 902 908 In a third aspect, alone or in combination with one or more of the first through second aspects, processfurther includes receiving (e.g., using reception component), based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band, and deriving (e.g., using derivation component) one or more additional measurements, associated with the second beam and the one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band using the second beam. Accordingly, the preferred beam is selected from at least the first beam and the second beam based at least in part on the one or more measurements and the one or more additional measurements.

700 902 908 In a fourth aspect, alone or in combination with one or more of the first through second aspects, processfurther includes receiving (e.g., using reception component), based at least in part on the one or more resources of the set of reference signal resources and using a second reception filter, a repetition of the at least one reference signal over the band, and deriving (e.g., using derivation component) one or more additional measurements, associated with the second reception filter and the one subband of the two or more subbands, based at least in part on the repetition of the at least one reference signal received over the band using the second reception filter. Accordingly, the preferred reception filter is selected from at least the first reception filter and the second reception filter based at least in part on the one or more measurements and the one or more additional measurements.

7 FIG. 7 FIG. 700 700 700 Althoughshows example blocks of process, in some aspects, processmay include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in. Additionally, or alternatively, two or more of the blocks of processmay be performed in parallel.

8 FIG. 10 FIG. 800 800 110 1000 is a diagram illustrating an example processperformed, for example, by a base station, in accordance with the present disclosure. Example processis an example where the base station (e.g., base stationand/or apparatusof) performs operations associated with configuring reference signal resource sets for subband measurements.

8 FIG. 9 FIG. 10 FIG. 6 FIG. 6 FIG. 800 120 900 810 1004 800 1004 As shown in, in some aspects, processmay include transmitting, to a UE (e.g., UEand/or apparatusof), an indication of a set of reference signal resources (block). For example, the base station (e.g., using transmission component, depicted in) may transmit, to a UE, an indication of a set of reference signal resources, as described above in connection with. In some aspects, the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE. Additionally, in some aspects, processmay further include transmitting, to the UE, an indication of the two or more subbands. For example, the base station (e.g., using transmission component) may transmit, to a UE, an indication of the two or more subbands, as described above in connection with. In some aspects, the indication of the two or more subbands is included in an RRC message, a MAC-CE, DCI, or a combination thereof. In some aspects, the indication of the two or more subbands is included in a message with the indication of the set of reference signal resources.

8 FIG. 6 FIG. 10 FIG. 6 FIG. 6 FIG. 800 820 1004 800 1002 800 1004 As further shown in, in some aspects, processmay include transmitting, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band (block). For example, the base station (e.g., using transmission component) may transmit, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band, as described above in connection with. In some aspects, processmay further include receiving, from the UE, an indication of a preferred beam on one subband of the two or more subbands, based at least in part on the at least one reference signal. For example, the base station (e.g., using reception component, depicted in) may receive, from the UE, an indication of a preferred beam on one subband of the two or more subbands, based at least in part on the at least one reference signal, as described above in connection with. In some aspects, processfurther includes applying a TCI state to use on the one subband of the two or more subbands, based at least in part on the preferred beam. For example, the base station (e.g., using transmission component) may apply a TCI state to use on the one subband of the two or more subbands, based at least in part on the preferred beam, as described above in connection with.

800 Processmay include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the indication of the set of reference signal resources is included in an RRC message, a MAC-CE, DCI, or a combination thereof.

In a second aspect, alone or in combination with the first aspect, the set of reference signal resources includes a set of CSI-RS resources.

In a third aspect, alone or in combination with one or more of the first through second aspects, the two or more subbands are based at least in part on one or more rules stored in a memory of the base station.

800 1004 In a fourth aspect, alone or in combination with one or more of the first through third aspects, processfurther includes transmitting (e.g., using transmission component), based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band. Accordingly, the preferred beam is selected from at least the first beam and the second beam.

800 1004 In a fifth aspect, alone or in combination with one or more of the first through third aspects, processfurther includes transmitting (e.g., using transmission component), based at least in part on the one or more resources of the set of reference signal resources and using a same beam, two or more repetitions of the at least one reference signal over the band.

8 FIG. 8 FIG. 800 800 800 Althoughshows example blocks of process, in some aspects, processmay include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in. Additionally, or alternatively, two or more of the blocks of processmay be performed in parallel.

9 FIG. 900 900 900 900 902 904 900 906 902 904 900 908 is a block diagram of an example apparatusfor wireless communication. The apparatusmay be a UE, or a UE may include the apparatus. In some aspects, the apparatusincludes a reception componentand a transmission component, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatusmay communicate with another apparatus(such as a UE, a base station, or another wireless communication device) using the reception componentand the transmission component. As further shown, the apparatusmay include a derivation component, among other examples.

900 900 700 900 6 FIG. 7 FIG. 9 FIG. 2 FIG. 9 FIG. 2 FIG. In some aspects, the apparatusmay be configured to perform one or more operations described herein in connection with. Additionally, or alternatively, the apparatusmay be configured to perform one or more processes described herein, such as processof, or a combination thereof. In some aspects, the apparatusand/or one or more components shown inmay include one or more components of the UE described above in connection with. Additionally, or alternatively, one or more components shown inmay be implemented within one or more components described above in connection with. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

902 906 902 900 902 906 902 2 FIG. The reception componentmay receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus. The reception componentmay provide received communications to one or more other components of the apparatus. In some aspects, the reception componentmay perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus. In some aspects, the reception componentmay include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with.

904 906 906 904 906 904 906 904 904 902 2 FIG. The transmission componentmay transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus. In some aspects, one or more other components of the apparatusmay generate communications and may provide the generated communications to the transmission componentfor transmission to the apparatus. In some aspects, the transmission componentmay perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus. In some aspects, the transmission componentmay include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with. In some aspects, the transmission componentmay be co-located with the reception componentin a transceiver.

902 906 900 906 902 906 902 908 908 2 FIG. In some aspects, the reception componentmay receive, from the apparatus, an indication of a set of reference signal resources. The set of reference signal resources may be associated with two or more subbands included in a band used for communication between the apparatusand the apparatus. In some aspects, the reception componentmay further receive, from the apparatus, an indication of the two or more subbands. Moreover, the reception componentmay receive, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band. Accordingly, the derivation componentmay derive one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band. In some aspects, the derivation componentmay include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with.

904 906 902 908 902 In some aspects, the transmission componentmay transmit, to the apparatus, an indication of a preferred beam on the one subband of the two or more subbands, based at least in part on the one or more measurements. For example, the reception componentmay receive, based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band. Additionally, the derivation componentmay derive one or more additional measurements, associated with the second beam and the one subband of the two or more subbands, based at least in part on the at least one reference signal that the reception componentreceived over the band using the second beam. Accordingly, the preferred beam may be selected from at least the first beam and the second beam based at least in part on the one or more measurements and the one or more additional measurements.

902 902 908 902 As an alternative, the reception componentmay apply a preferred reception filter to use on the one subband of the two or more subbands, based at least in part on the one or more measurements. For example, the reception componentmay receive, based at least in part on the one or more resources of the set of reference signal resources and using a second reception filter, a repetition of the at least one reference signal over the band. Additionally, the derivation componentmay derive one or more additional measurements, associated with the second reception filter and the one subband of the two or more subbands, based at least in part on the repetition of the at least one reference signal that the reception componentreceived over the band using the second reception filter. Accordingly, the preferred reception filter may be selected from at least the first reception filter and the second reception filter based at least in part on the one or more measurements and the one or more additional measurements.

9 FIG. 9 FIG. 9 FIG. 9 FIG. 9 FIG. 9 FIG. The number and arrangement of components shown inare provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in. Furthermore, two or more components shown inmay be implemented within a single component, or a single component shown inmay be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown inmay perform one or more functions described as being performed by another set of components shown in.

10 FIG. 1000 1000 1000 1000 1002 1004 1000 1006 1002 1004 1000 1008 is a block diagram of an example apparatusfor wireless communication. The apparatusmay be a base station, or a base station may include the apparatus. In some aspects, the apparatusincludes a reception componentand a transmission component, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatusmay communicate with another apparatus(such as a UE, a base station, or another wireless communication device) using the reception componentand the transmission component. As further shown, the apparatusmay include a selection component, among other examples.

1000 1000 800 1000 6 FIG. 8 FIG. 10 FIG. 2 FIG. 10 FIG. 2 FIG. In some aspects, the apparatusmay be configured to perform one or more operations described herein in connection with. Additionally, or alternatively, the apparatusmay be configured to perform one or more processes described herein, such as processof, or a combination thereof. In some aspects, the apparatusand/or one or more components shown inmay include one or more components of the base station described above in connection with. Additionally, or alternatively, one or more components shown inmay be implemented within one or more components described above in connection with. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

1002 1006 1002 1000 1002 1006 1002 2 FIG. The reception componentmay receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus. The reception componentmay provide received communications to one or more other components of the apparatus. In some aspects, the reception componentmay perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus. In some aspects, the reception componentmay include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with.

1004 1006 1006 1004 1006 1004 1006 1004 1004 1002 2 FIG. The transmission componentmay transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus. In some aspects, one or more other components of the apparatusmay generate communications and may provide the generated communications to the transmission componentfor transmission to the apparatus. In some aspects, the transmission componentmay perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus. In some aspects, the transmission componentmay include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with. In some aspects, the transmission componentmay be co-located with the reception componentin a transceiver.

1004 1006 1000 1006 1004 1006 1004 In some aspects, the transmission componentmay transmit, to the apparatus, an indication of a set of reference signal resources. The set of reference signal resources may be associated with two or more subbands included in a band used for communication between the apparatusand the apparatus. In some aspects, the transmission componentmay further transmit, to the apparatus, an indication of the two or more subbands. Moreover, the transmission componentmay transmit, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

1002 1006 1004 1004 In some aspects, the reception componentmay receive, from the apparatus, an indication of a preferred beam on one subband of the two or more subbands, based at least in part on the at least one reference signal. Accordingly, the transmission componentmay apply a TCI state to use on the one subband of the two or more subbands, based at least in part on the preferred beam. In some aspects, the transmission componentmay transmit, based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band. Accordingly, the preferred beam may be selected from at least the first beam and the second beam.

1004 As an alternative, the transmission componentmay transmit, based at least in part on the one or more resources of the set of reference signal resources and using a same beam, two or more repetitions of the at least one reference signal over the band.

10 FIG. 10 FIG. 10 FIG. 10 FIG. 10 FIG. 10 FIG. The number and arrangement of components shown inare provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in. Furthermore, two or more components shown inmay be implemented within a single component, or a single component shown inmay be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown inmay perform one or more functions described as being performed by another set of components shown in.

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a base station, an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the UE and the base station; receiving, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band; and deriving one or more measurements, associated with one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band.

Aspect 2: The method of Aspect 1, wherein the set of reference signal resources comprises a set of channel state information reference signal resources.

Aspect 3: The method of any one of Aspects 1 through 2, further comprising: receiving, from the base station, an indication of the two or more subbands.

Aspect 4: The method of any one of Aspects 1 through 3, wherein the two or more subbands are based at least in part on one or more rules stored in the memory of the UE.

Aspect 5: The method of any one of Aspects 1 through 4, further comprising: transmitting, to the base station, an indication of a preferred beam on the one subband of the two or more subbands, based at least in part on the one or more measurements.

Aspect 6: The method of Aspect 5, wherein the one or more measurements are associated with a first beam, and wherein the memory and the one or more processors are further configured to: receiving, based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band; and deriving one or more additional measurements, associated with the second beam and the one subband of the two or more subbands, based at least in part on the at least one reference signal received over the band using the second beam, wherein the preferred beam is selected from at least the first beam and the second beam based at least in part on the one or more measurements and the one or more additional measurements.

Aspect 7: The method of any one of Aspects 1 through 4, further comprising: applying a preferred reception filter to use on the one subband of the two or more subbands, based at least in part on the one or more measurements.

Aspect 8: The method of Aspect 7, wherein the one or more measurements are associated with a first reception filter, and wherein the memory and the one or more processors are further configured to: receiving, based at least in part on the one or more resources of the set of reference signal resources and using a second reception filter, a repetition of the at least one reference signal over the band; and deriving one or more additional measurements, associated with the second reception filter and the one subband of the two or more subbands, based at least in part on the repetition of the at least one reference signal received over the band using the second reception filter, wherein the preferred reception filter is selected from at least the first reception filter and the second reception filter based at least in part on the one or more measurements and the one or more additional measurements.

Aspect 9: A method of wireless communication performed by a base station, comprising: transmitting, to a user equipment (UE), an indication of a set of reference signal resources, wherein the set of reference signal resources is associated with two or more subbands included in a band used for communication between the base station and the UE; and transmitting, based at least in part on one or more resources of the set of reference signal resources, at least one reference signal over the band.

Aspect 10: The method of Aspect 9, wherein the indication of the set of reference signal resources is included in a radio resource control message, a medium access control layer control element, downlink control information, or a combination thereof.

Aspect 11: The method of any one of Aspects 9 through 10, wherein the set of reference signal resources comprises a set of channel state information reference signal resources.

Aspect 12: The method of any one of Aspects 9 through 11, further comprising: transmitting, to the UE, an indication of the two or more subbands.

Aspect 13: The method of Aspect 12, wherein the indication of the two or more subbands is included in a radio resource control message, a medium access control layer control element, downlink control information, or a combination thereof.

Aspect 14: The method of any one of Aspects 12 through 13, wherein the indication of the two or more subbands is included in a message with the indication of the set of reference signal resources.

Aspect 15: The method of any one of Aspects 9 through 14, wherein the two or more subbands are based at least in part on one or more rules stored in the memory of the base station.

Aspect 16: The method of any one of Aspects 9 through 15, further comprising: receiving, from the UE, an indication of a preferred beam on one subband of the two or more subbands, based at least in part on the at least one reference signal.

Aspect 17: The method of Aspect 16, wherein the at least one reference signal is transmitted using a first beam, and wherein the memory and the one or more processors are further configured to: transmitting, based at least in part on the one or more resources of the set of reference signal resources and using a second beam, the at least one reference signal over the band, wherein the preferred beam is selected from at least the first beam and the second beam.

Aspect 18: The method of any one of Aspects 16 through 17, further comprising: applying a transmission configuration indicator state to use on the one subband of the two or more subbands, based at least in part on the preferred beam.

Aspect 19: The method of any one of Aspects 9 through 15, comprising: transmitting, based at least in part on the one or more resources of the set of reference signal resources and using a same beam, two or more repetitions of the at least one reference signal over the band.

Aspect 20: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 1-8.

Aspect 21: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 1-8.

Aspect 22: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 1-8.

Aspect 23: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 1-8.

Aspect 24: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 1-8.

Aspect 25: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 9-19.

Aspect 26: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 9-19.

Aspect 27: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 9-19.

Aspect 28: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 9-19.

Aspect 29: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 9-19.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a processor is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code—it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items), and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of”).